Rose engine



Nam 1131, M58 w. BRANDSTii TTER ROSE ENGINE Filed April 2 United States Patent '0 ROSE ENGINE v Wilhelm Brandstitter, Frankfurt am Main, Germany Application April 2, 1954, Serial No. 420,667

4 Claims. (Cl. 9016) The invention relates to rose engines comprising rotating cutters.

In the known constructions, cutters are removably fitted in driving spindles and are removed therefrom for the purpose of regrinding. When the cutter is repositioned in the spindle, however, there is no guarantee that it will again be exactly mounted centrally in'the rotating part of the cutter spindle.

Moreover, the depth to which the cutter is introduced into the cutter spindle must correspond to the reduction inthe length of the cutter as a result of the regrinding thereof. complicated manipulations and the use of end-measure gauges or the like and is therefore extremely time-consuming. Further, there is no guarantee that the point of the cutter will not already have been damaged in these adjustments. I I

"In rose engine's employed to produce the plates for the printing ofbank' notes or securities, however, accurate adjustment of acutter in the axial direction of the associated driving spindle and the vertical positioning Patented Nov. 11, 1958 ice can be re-introduced into the supporting bushing of the machine without any other adjustment being required.

The invention will hereinafter be more particularly described with reference to the accompanying drawings in which:

Figure 1 is a diagrammatic side elevation of a rose engine,

Figure 2 is an axial section through the mounting of the engraving spindle,

Figure 3 is a cross-section on line IIIIII of Figure 2,

Figure 4 is a side elevation of the optical adjusting instrument,

Figure 5 is a plan view of the reproducing mirror of the adjusting instrument along line V--V of Figure 4, on a larger scale, and

Figure 6 is a plan view corresponding to Figure 5,

' showing a different cutter.

This readjustment of the cutter necessitates The rose engine according to Figure 1 consists in known manner of a bed plate 1 supporting two cross: slides 3 and 4 on a rotatable mounting 2, the upper slide 4 receiving a clamping plate 5 for clamping a workpiece 6 in position. The plate 5 is driven through belt pulleys 7. Depending upon the adjustment of the two slides 3 and 4, the clamping plate 5 consequently per-e forms a predetermined circular movement.

-A11 arm '9 is so mounted on a pillar 8 on the bed plate 1 as to be displaceable in a horizontal plane. Displaceably mounted on the arm 9 is a slide 10, the position of which on the arm is adjustable by means of a lead screw 11. The slide supports a bushing 12 surrounding a sleeve provided with an upper bearing surface are of vital importance for' insuring clear and comfitted is rotatably mounted .in a sleeve which is adapted to be introduced with an adjustable abutment against a fixed bearing means into a supporting bush in the machine. The cutter can consequently 'be withdrawnfrom the machine together with the spindle and the sleeve and regroundm Therefore, the central re-alignment- .of the 115? cutter is insured wh n the sleeve is reintroduced into the supporting-bushing of the machine; J The vertical adjustment of 'the cutters shortened by grinding can be compensated for-by axial adjustment of the'adjustable abutnflent of the sleeve. justment is preferably effected by means of an optical auxiliary instrumflntwhich ,iszfashi'oned in the manner of a measuring microscope and consists of an optical observation system and a clamping device provided with a bearing shoulder for the spindle sleeve. The distance of the bearing shoulder from the axis of the optical observation system corresponds to a fixed value which in turn corresponds substantially to the distance of the bearing shoulder of the supporting bushing of the machine from the workpiece.

After slackening of a gripping device, the abutment on the sleeve can be displaced to such an extent in the auxiliary instrument that the point of the cutter pin enters the reticle of the optical observation system. The gripping device is then tightened again and the sleeve This read- 1;.

13. Fitted into the bushing 12 from above is a, sleeve 14 having an upper position engaging a rotatable ring 15, the lower side of which serves as an abutment for the bearing surface 13 of the sleeve surrounded by the bushing 12, and determines the depth to which the sleeve 14 is introduced. The ring 15 is adapted to be held fast on the sleeve 14 by a set screw 16.

Rotatably mounted in the sleeve 14 by means of the ball bearing 17 is a'spindle 18 having an axial bore 19 to receive the cutter 20. The cutter 20 is held in the axial bore 19 by a grub screw 21.

The bushing 12 is sub-divided by two transverse slots 22, and the center piece 23 defined by the slots 22'is; divided by an axial slot 24 (Fig. 3). The two component elements are provided with eyes 25 and 26- on the edges bounding the slot 24, to receive a tommy screw 27. Consequently, the sleeve 14 can be gripped fast in the bushing 12 by tightening the tommy screw 27.

The spindle 18 is also provided with a grooved pulley 28. Disposed adjacent the bed plate 1 is'a pedestal 29 supporting an electric motor 30, on the shaft of which a stepped pulley 31 is mounted. The spindle 18 is adapted to be driven by a belt 32 passing around the stepped pulley 31 and the grooved pulley 28. Y

For a given wall thickness of the plate 6 to be engraved, the distance of theupper face 13 of the bushing 12 ;-is;,e qual to the distanceH (Figure l). The distance of the point of the engraving tool 20 from the lower face of the adjusting ring 15 is then equal to the distance H plus the depth of penetration h of the cutter point into the workpiece 6 (Figure 2). When the cutter point becomes worn, or is reground, the cutter point must be readjusted to the measurement H+h from the lower side of the adjusting ring 15.

The arrangement illustrated in Figures 4 and 5 is employed for the exact adjustment. This arrangement consists of a base plate 33 with a pillar 34, on which a measuring microscope is mounted. Provided on the base plate, in alignment with the optical axis 36 of the measuring microscope 35 is a mirror 37 provided with a reticle 38 and a scale 39, by means of which it is possible to measure also the width of the cutter and consequently indirectly the line width to be cut. Figure 6 shows a cutter, the blunt edgeStl of which is measured on the cale The base plate 33 supports a bearing bracket 40 having a bore 41, the diameter of which corresponds to that of the sleeve 14. The length of the bracket 40 is so designed that the distance of the end face 42 of the bearing bracket 40 from the optical axis 36 is equal to the dista ce H+ Before work is performed and after regrinding of the engraving cutter 20, the sleeve 14 is introduced into the bearing bracket 40 and, after slackening of the clamping screw 16, the adjusting ring 15 is displaced on the screwthreaded portion 43 of the sleeve 14 until it bears against the end face 42 of the bearing bracket 40- and the cutter point appears exactly at the center of the reticle 38, that is to say, on the optical axis 36, so that the distance of the cutter point from the bearing face of the adjustment ring 15 is exactly equal to the distance H+h. vThe clamping screw 16 is, then tightened and the sleeve can then be fitted into the bushing 12 without any further adjustment Of the latter and can be clamped fast by tightening of the tommy screw 27 in the position in which the ring 15 bears against the shoulder 13 of the bushing 12.

The center piece 23 of the bushing 12 is so mounted in a corresponding slot 45 in the slide by means of a dovetail 44 so as to be vertically adjustable therein and, has; a lateral bearing eye 46 having a screwthreaded aperture 47- to receive a screwthreaded spindle 48. The screwthreaded spindle 48 bears against a lug 49 on the slide 10. By rotation of the screwthreaded spindle 48, the vertical position of the bushing 12 on the slide 16 can thus be adjusted, so that the distance H between the workpiece and the bearing surface 13 of the bushing 12 can be adjusted independently of the wall thickness of the workpiece 6 to be engraved.

What is claimed is:

1. In a rose engine, in combination, a spindle, a sleeve arranged for rotatably accommodating said spindle, a bushing arranged for the accommodation of said sleeve, said bushing being adapted for support in the engine, an abutment ring adjustably arranged on said sleeve, a bearing surface associated with said bushing, a bearing surface on said abutment ring adapted to engage said bearing surface associated with said bushing, and an engraving toolcarried by said spindle, said bushing defining an unimpeded axial opening for said sleeve whereby said sleeve is removable bya simple axial displacement, said tool being operatively associated with said engine and being driven thereby.

2 In a rose engine, in combination, a spindle, a sleeve for rotatably accommodating said spindle, a bushing arranged for accommodating said sleeve, said bushing being adapted for support in a rose engine, a slide adjustably carrying said bushing, an abutment ring on said sleeve and arranged adjustably in the, axial direction thereof, a bearing surface on said bushing, a further bearing surface on said abutment ring adapted to abut against the bearing surface on said bushing, and an engraving tool carried by said spindle, said tool having a pointed end being located at a predetermined distance from the bearing surface on the abutment ring, said bushing defining an unimpeded axial opening for said sleeve whereby said sleeve is removable by a simple axial displacement, said tool being operatively associated with said engine and being driven thereby.

3. In a rose engine, in combination, a spindle, a sleeve for rotatably accommodating said spindle, a bushing arranged for accommodating said sleeve, said bushing being adapted for support in a rose engine, a slide carrying said bushing, a lug on said slide, a lug having a tapped hole on said bushing in alignment with the lug on said slide, a screw engaging said tapped hole and abutting the lug on the slide to provide adjustment of said bushing with respect to the slide, an abutment ring adjustably arranged on said sleeve, a bearing surface on said ring, a corresponding bearing surface on said bushing, and an engraving tool carried by said spindle, said engraving tool having a working part protruding therefrom, the working part being located at a predetermined distance from the bearing surface on the abutment ring, said bushing defining an unimpeded axial opening for said sleeve whereby said sleeve is removable by a simple axial displacement, said tool being operatively associated with said engine and being driven thereby.

4.. In a rose engine, in combination, a spindle, a sleeve for rotatably accommodating said spindle, a bushing arranged for receiving said sleeve, said bushing being adapted for support in a rose engine, said bushing having two circumferential slots therein and an axial slot connecting said circumferential slots to form a pair of sleeveembracing arms, each of said arms having a bore therein, said bores being mutually coaxial and disposed tangentially to said bushing, one of said bores being tapped, a tommy screw passing through the bores and engaging said tapped bore to render the arms movable to grip said sleeve, a slide adjustably carrying said bushing, an abutment ring on said sleeve, said adjustment ring being adjustable axially thereof, a bearing surface on said abutment ring, a correspondingbearing surface on said bushing, and an engraving tool carried by said spindle, said tool having a free end to be located at a. predetermined distance from the bearing surface on said abutment ring, said bushing defining an unimpeded axial opening for said sleeve whereby said sleeve is removable by a simple axial displacement, said tool being operatively associated with said engine and being driven thereby.

References Cited in the file of this patent UNITED. STATES, PATENTS 

